P06ADControl Module Internal Temperature Sensor B Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Control modules can carry a second internal temperature sensor (B). In GM's 6T70/6T75 and related automatics, sensor A measures the circuit board (substrate) temperature, sensor B the 'power-up temperature' used as a reference and substitute; both sit inside the transmission module in the valve body, so repairs mean module or valve body. P06AD means the sensor B signal is at its low end: GM converts it and treats −59 °C or less for 60 s as a fault, lamp after two trips. Unlike most temperature sensors, low here corresponds to an implausibly cold reading. The module then uses a substitute value.
- What you may notice
- Warning or check engine light
- Changed shift quality (substitute value)
- Implausible module temperature in the scan tool
- Likely causes
- LikelyTransmission module or valve body (internal sensor) faulty
- PossibleMoisture or fluid in the module electronics
- RareModule supply or software
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €300 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.